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authorRalf Baechle <ralf@linux-mips.org>2009-09-17 02:25:05 +0200
committerRalf Baechle <ralf@linux-mips.org>2009-09-17 20:07:49 +0200
commitf1e39a4a616cd9981a9decfd5332fd07a01abb8b (patch)
tree555e0c78611bb30cef2caca1ae1b5043a9999290 /arch/mips/kernel/scall64-64.S
parentf4c6b6bc5a4fc8d607f2d89369008c85a3a12a8b (diff)
MIPS: Rewrite sysmips(MIPS_ATOMIC_SET, ...) in C with inline assembler
This way it doesn't have to use CONFIG_CPU_HAS_LLSC anymore. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/scall64-64.S')
-rw-r--r--arch/mips/kernel/scall64-64.S72
1 files changed, 0 insertions, 72 deletions
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index 3d866f24e064..b97b993846d6 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -124,78 +124,6 @@ illegal_syscall:
j n64_syscall_exit
END(handle_sys64)
- LEAF(mips_atomic_set)
- andi v0, a1, 3 # must be word aligned
- bnez v0, bad_alignment
-
- LONG_L v1, TI_ADDR_LIMIT($28) # in legal address range?
- LONG_ADDIU a0, a1, 4
- or a0, a0, a1
- and a0, a0, v1
- bltz a0, bad_address
-
-#ifdef CONFIG_CPU_HAS_LLSC
- /* Ok, this is the ll/sc case. World is sane :-) */
-1: ll v0, (a1)
- move a0, a2
-2: sc a0, (a1)
-#if R10000_LLSC_WAR
- beqzl a0, 1b
-#else
- beqz a0, 1b
-#endif
-
- .section __ex_table,"a"
- PTR 1b, bad_stack
- PTR 2b, bad_stack
- .previous
-#else
- sw a1, 16(sp)
- sw a2, 20(sp)
-
- move a0, sp
- move a2, a1
- li a1, 1
- jal do_page_fault
-
- lw a1, 16(sp)
- lw a2, 20(sp)
-
- /*
- * At this point the page should be readable and writable unless
- * there was no more memory available.
- */
-1: lw v0, (a1)
-2: sw a2, (a1)
-
- .section __ex_table,"a"
- PTR 1b, no_mem
- PTR 2b, no_mem
- .previous
-#endif
-
- sd zero, PT_R7(sp) # success
- sd v0, PT_R2(sp) # result
-
- j n64_syscall_exit # continue like a normal syscall
-
-no_mem: li v0, -ENOMEM
- jr ra
-
-bad_address:
- li v0, -EFAULT
- jr ra
-
-bad_alignment:
- li v0, -EINVAL
- jr ra
- END(mips_atomic_set)
-
- LEAF(sys_sysmips)
- beq a0, MIPS_ATOMIC_SET, mips_atomic_set
- j _sys_sysmips
- END(sys_sysmips)
-
.align 3
sys_call_table:
PTR sys_read /* 5000 */